package com.yxn.base;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * spring 工具类
 * @author zhangsaizz
 *
 */
@Component
public class SpringUtil implements ApplicationContextAware,BeanPostProcessor {

	Logger logger = LoggerFactory.getLogger(SpringUtil.class);
	private static ApplicationContext applicationContext;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringUtil.applicationContext == null) {
			SpringUtil.applicationContext = applicationContext;
		}
	}

	/**
	 * 获取applicationContext
	 * @return
	 */
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	/**
	 *  通过name获取 Bean.
	 * @param name
	 * @return
	 */
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	/**
	 *  通过class获取Bean.
	 * @param clazz
	 * @return
	 */
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	/**
	 *  通过name,以及Clazz返回指定的Bean
	 * @param name
	 * @param clazz
	 * @return
	 */
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}

	@Override
	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
		logger.info("开始实例化--------beanName={}",beanName);
		return bean;
	}

	@Override
	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
		logger.info("实例化--------beanName={};完成",beanName);
		return bean;
	}
}
